package com.cnpinxi.tool.excel;

import org.apache.commons.lang3.StringUtils;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.jeecgframework.poi.excel.entity.enmus.ExcelType;

import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 利用开源组件POI3.0.2动态导出EXCEL文档 转载时请保留以下信息，注明出处！
 * 
 * @author leno
 * @version v1.0
 * @param <T>
 *            应用泛型，代表任意一个符合javabean风格的类
 *            注意这里为了简单起见，boolean型的属性xxx的get器方式为getXxx(),而不是isXxx()
 *            byte[]表jpg格式的图片数据
 */
public class ExportExcelNew<T>
{
    private Workbook workbook;
    private Sheet sheet = null;
    private CellStyle style;
    private CellStyle style2;
    private String pattern = "yyyy-MM-dd";
    private Drawing patriarch;
    private int index = 0;
    private int col = 0;
    private Font StringFont;
	public ExportExcelNew(ExcelType entity,int size,String title,String[] headers, String pattern)
    {
        super();
        init(entity, size, title,headers, pattern);

    }
	public ExportExcelNew(ExcelType entity,String title,String[] headers)
    {
        super();
        init(entity, 0, title,headers, pattern);

    }
    public ExportExcelNew(String title,String[] headers)
    {
        super();
        init(ExcelType.XSSF, 0, title,headers,"yyyy-MM-dd");
    }
    
	public ExportExcelNew(String title,String[] headers, String pattern)
    {
        super();
        init(ExcelType.XSSF, 0, title,headers,pattern);
    }

    private void init(ExcelType entity, int size, String title, String[] headers, String pattern)
    {
        // 声明一个工作薄
           if (ExcelType.HSSF == entity) {
               workbook = new HSSFWorkbook();
           } else if (size < 1000) {
               workbook = new XSSFWorkbook();
           } else {
               workbook = new SXSSFWorkbook();
           }
           // 生成一个表格
           sheet = workbook.createSheet(title);
           // 设置表格默认列宽度为15个字节
           sheet.setDefaultColumnWidth((short) 15);
           // 生成一个样式
           style = workbook.createCellStyle();
           // 设置这些样式
           style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
           style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
           style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
           style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
           style.setBorderRight(HSSFCellStyle.BORDER_THIN);
           style.setBorderTop(HSSFCellStyle.BORDER_THIN);
           style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
           // 生成一个字体
           Font font = workbook.createFont();
           font.setColor(HSSFColor.VIOLET.index);
           font.setFontHeightInPoints((short) 12);
           font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
           // 把字体应用到当前的样式
           style.setFont(font);
           // 生成并设置另一个样式
           style2 = workbook.createCellStyle();
           style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
           style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
           style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
           style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
           style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
           style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
           style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
           style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
           // 生成另一个字体
           Font font2 = workbook.createFont();
           font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
           // 把字体应用到当前的样式
           style2.setFont(font2);

           // 声明一个画图的顶级管理器
           Drawing patriarch = sheet.createDrawingPatriarch();
           // 定义注释的大小和位置,详见文档
           Comment comment = patriarch.createCellComment(new HSSFClientAnchor(0,
                   0, 0, 0, (short) 4, 2, (short) 6, 5));
           // 设置注释内容
           comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
           // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
           comment.setAuthor("lisheng");
        // 产生表格标题行
           Row row = sheet.createRow(0);
           col = headers.length;
           for (short i = 0; i < col; i++)
           {
               Cell cell = row.createCell(i);
               cell.setCellStyle(style);
               HSSFRichTextString text = new HSSFRichTextString(headers[i]);
               cell.setCellValue(text);
           }
           this.pattern = pattern;
           StringFont = workbook.createFont();
           StringFont.setColor(HSSFColor.BLUE.index);
    }

	/**
	 * 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上
	 * 
	 * @param title
	 *            表格标题名
	 * @param headers
	 *            表格属性列名数组
	 * @param dataset
	 *            需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的
	 *            javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)
	 * @param out
	 *            与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中
	 * @param pattern
	 *            如果有时间数据，设定输出格式。默认为"yyy-MM-dd"
	 */
	@SuppressWarnings("unchecked")
	public void exportExcel(Collection<T> dataset)
	{
		
		// 遍历集合数据，产生数据行
		Iterator<T> it = dataset.iterator();
		while (it.hasNext())
		{
			index++;
			Row row = sheet.createRow(index);
			T t = (T) it.next();
			if(t instanceof Map){
			    Map<String, Object> t1 =  (LinkedHashMap)(t);
			    short i = 0;
			    for (Map.Entry<String, Object> entry : t1.entrySet()) {
	                this.addCellValue(row, index, i, entry.getValue());
	                ++i;
			    }
			}else{
			    // 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
			    Field[] fields = t.getClass().getDeclaredFields();
			    for (short i = 0; i < fields.length && i<col; i++)
			    {
			        Field field = fields[i];
			        String fieldName = field.getName();
			        String getMethodName = "get"
			                + fieldName.substring(0, 1).toUpperCase()
			                + fieldName.substring(1);
		            Class<? extends Object> tCls = t.getClass();
		            try
                    {
                        Method getMethod = tCls.getMethod(getMethodName,
                                new Class[]
                                {});
                        Object value = getMethod.invoke(t, new Object[]
                        {});
                        this.addCellValue(row, index, i, value);
                    }
                    catch (NoSuchMethodException e)
                    {
                        e.printStackTrace();
                    }
                    catch (SecurityException e)
                    {
                        e.printStackTrace();
                    }
                    catch (IllegalAccessException e)
                    {
                        e.printStackTrace();
                    }
                    catch (IllegalArgumentException e)
                    {
                        e.printStackTrace();
                    }
                    catch (InvocationTargetException e)
                    {
                        e.printStackTrace();
                    }
			    }
			}
		}
		
	}

	public void save(OutputStream out){
	    try
        {
            workbook.write(out);
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }finally{
            try
            {
                workbook.close();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
	}

    private void addCellValue(Row row, int index,
        short i, Object value)
    {
        Cell cell = row.createCell(i);
        cell.setCellStyle(style2);
        // 判断值的类型后进行强制类型转换
        String textValue = null;
        // if (value instanceof Integer) {
        // int intValue = (Integer) value;
        // cell.setCellValue(intValue);
        // } else if (value instanceof Float) {
        // float fValue = (Float) value;
        // textValue = new HSSFRichTextString(
        // String.valueOf(fValue));
        // cell.setCellValue(textValue);
        // } else if (value instanceof Double) {
        // double dValue = (Double) value;
        // textValue = new HSSFRichTextString(
        // String.valueOf(dValue));
        // cell.setCellValue(textValue);
        // } else if (value instanceof Long) {
        // long longValue = (Long) value;
        // cell.setCellValue(longValue);
        // }
        if (value instanceof Boolean)
        {
        	boolean bValue = (Boolean) value;
        	textValue = "男";
        	if (!bValue)
        	{
        		textValue = "女";
        	}
        }
        else if (value instanceof Date)
        {
        	Date date = (Date) value;
        	SimpleDateFormat sdf = new SimpleDateFormat(pattern);
        	textValue = sdf.format(date);
        }
        else if (value instanceof byte[])
        {
        	// 有图片时，设置行高为60px;
        	row.setHeightInPoints(60);
        	// 设置图片所在列宽度为80px,注意这里单位的一个换算
        	sheet.setColumnWidth(i, (short) (35.7 * 80));
        	// sheet.autoSizeColumn(i);
        	byte[] bsValue = (byte[]) value;
        	HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
        			1023, 255, (short) 6, index, (short) 6, index);
        	anchor.setAnchorType(2);
        	patriarch.createPicture(anchor, workbook.addPicture(
        			bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
        }
        else
        {
        	// 其它数据类型都当作字符串简单处理
            if(value==null){
                textValue = "";
            }else{
                textValue = String.valueOf(value);
            }
        }
        // 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
        if (StringUtils.isNotBlank(textValue))
        {
        	Pattern p = Pattern.compile("^//d+(//.//d+)?$");
        	Matcher matcher = p.matcher(textValue);
        	if (matcher.matches())
        	{
        		// 是数字当作double处理
        		cell.setCellValue(Double.parseDouble(textValue));
        	}
        	else
        	{
        		HSSFRichTextString richString = new HSSFRichTextString(
        				textValue);
        		richString.applyFont(StringFont);
        		cell.setCellValue(richString);
        	}
        }else{
            HSSFRichTextString richString = new HSSFRichTextString(
                textValue);
            richString.applyFont(StringFont);
            cell.setCellValue(richString);
        }
    }

}